Fanning-mill



l(No Model.)

P. M. FABING 8u' J. ACKERMANN.

FANNING MILL.

Patented Peb. a, 1885.

right, and having a swell or corrugation, G,

l"'Nrrnn STATES' Fafrnnr "l rricn.

FANNINGIVIILL.

SPECIFICATION forming part of Letters Patent No. 311,733, dated February 3, 1885.

30, 1584. (No model.)

To all whom it 11M/ry concern:

Be it known that we, PETER M. FABING and JOHN ACKERMANN, citizens of the United States,and residents of Roxbury, in the county of Dane and State of Wisconsin,have invented certain new and usel'ul Improvements in Fanning-Mills; and we do hereby declare that the following is a full, clear, and exact descrip tion ot' the invention, which enable others skilled in the art to which it appertains to lnake and use the saine, reference being had to the accompanying drawings, which forni a part of this specification, and in which- Figure l is a vertical sectional View of a portion of a l`anning-niill provided with our stepped screen, and Figs. 2 and 3 are respectively a perspective View ot' the entire stepped screen and ot' one ofthe strips or steps.

Similar letters of reference indicate corresponding parts in all the figures.

Our invention has relation to so-called stepped screens for tanning-mills; and it consistsin the improved construction and conibination ot' parts of the same, as hereinafter more fully described and claimed.

In the accompanying drawings, the let-ter A indicates the lower, portion of thc hopper or chute from which the grain to be cleaned or separated is fed. L, indicates the stepped screen, which is in the nature of a stepped inclined screen; and G indicates the separatorscreens and D a portion ot the fan, all of which usual parts of a farming-mill may be of any desired construction. The stepped screen is placed above the screens, and above and slightlyin front ot' the fan, and is coinposed of two inclined side pieces, E E, iuclined at an angle of about forty-five degrees, and these side pieces are connected by nieans ot' strips or steps F, of sheet metal, bent longitudinally at an obtuse angle, nearly at the bend projecting upon the upper side of the strip,the downwardlybent portions of the stripsl'acing toward the fan. The outer edges of the upper portions of the strips or steps project nearly in a line with the inner edges of the strips below them, and it will be seen that when the mill is in operation, and the grain is fed down upon the inclined screen from the hopper the blast from the fan will force the chaff and lighter particles contained in the grain oii" frorn the said screen, the blast striking the downwardly-projeeting slightlyinclined inner portions of the strips7 which will cause the blast to pass up through the screen in a slightly-inclined upward direc tion, while the heavier good grain will fall through between the edges ofthe strips down upon the cleaning screens, where it will be subjected to further cleaning. 'llhe ends I-I and I of the two anges or bent portions of Vthe-strips are separated and bent at a right angle to the iianges, whereupon they are secured to the inner sides of the side pieces of the screen, and the longitudinal rib or corrugations at the bend ,of the strips serve to strengthen the strips and prevent their bend ing.

Having thus described our invention, we claim and desire to secure by Letters Patent ot the United States The combination, in a tanning-mill, of two inclined side pieces, and a number of strips or steps bent longitudinally atan obtuse angle formed with corrugations at the bends. and having the ends ot' the flanges separated and bent at right angles to the flanges and secured to the inner sides ofthe side pieces, the inner lianges ot' the steps projecting incli'nedly downward, as and for the purpose shown and set forth.

In testimony that we claim the foregoing -as our own we have hereunto aflixed our signatures in presence of two witnesses.

PETER M. FABING. JOHN ACKERMANN. "Witnesses:

J. S. TRIP?, GHAs. SCHLUNGBAUM. 

